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'Houston, we've had a problem': Remembering Apollo 13 at 50

In this April 11, 1970 photo made available by NASA, the Saturn V rocket carrying the crew of the Apollo 13 mission to the moon launches from the Kennedy Space Center in Florida. (NASA via AP)

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CAPE CANAVERAL, FLA. --
Apollo 13's astronauts never gave a thought to their mission number as they blasted off for the moon 50 years ago. Even when their oxygen tank ruptured two days later -- on April 13.

Jim Lovell and Fred Haise insist they're not superstitious. They even use 13 in their email addresses.

As mission commander Lovell sees it, he's incredibly lucky. Not only did he survive NASA's most harrowing moonshot, he's around to mark its golden anniversary.

"I'm still alive. As long as I can keep breathing, I'm good," Lovell, 92, said in an interview with The Associated Press from his Lake Forest, Ill., home.

A half-century later, Apollo 13 is still considered Mission Control's finest hour.

Lovell calls it "a miraculous recovery."

Haise, like so many others, regards it as NASA's most successful failure.

"It was a great mission," Haise, 86, said. It showed "what can be done if people use their minds and a little ingenuity."

As the lunar module pilot, Haise would have become the sixth man to walk on the moon, following Lovell onto the dusty gray surface. The oxygen tank explosion robbed them of the moon landing, which would have been NASA's third, nine months after Apollo 11's Neil Armstrong and Buzz Aldrin took humanity's first footsteps on the moon.

Now the coronavirus pandemic has robbed them of their anniversary celebrations. Festivities are on hold, including at Kennedy Space Center in Florida, where the mission began on April 11, 1970, a Saturday just like this year.

That won't stop Haise, who still lives in Houston, from marking what he calls "boom day" next Monday, as he does every April 13.

Lovell, Haise and Jack Swigert, a last-minute fill-in who died in 1982, were almost to the moon when they heard a bang and felt a shudder. One of two oxygen tanks had burst in the spacecraft's service module.

The tense words that followed are the stuff of space -- and movie -- fame.

Lovell reported a sudden voltage drop in one of the two main electrical circuits. Within seconds, Houston's Mission Control saw pressure readings for the damaged oxygen tank plunge to zero. The blast also knocked out two electrical power-generating fuel cells and damaged the third.

As Lovell peered out the window and saw oxygen escaping into the black void, he knew his moon landing was also slipping away. He shoved all emotions aside.

"Not landing on the moon or dying in space are two different things," Lovell explained, "and so we forgot about landing on the moon. This was one of survival. How do we get home?"

The astronauts were 200,000 miles (322,000 kilometres) from Earth. Getting back alive would require calm, skill and, yes, luck.

"The explosion could not have happened at a better time," Lovell said.

Much earlier, he said, and the astronauts wouldn't have had enough electrical power to make it around the moon and slingshot back to Earth for a splashdown. A blast in lunar orbit or, worse still, while Lovell and Haise were on the surface, "that would be the end of it."

"I think we had some divine help in this flight," Lovell said.

The aborted mission went from being so humdrum that none of the major TV networks broadcast the astronauts' show-and-tell minutes before the explosion, to a life-and-death drama gripping the entire world.

As flight director Gene Kranz and his team in Houston raced to come up with a rescue plan, the astronauts kept their cool. It was Lovell's fourth spaceflight - his second to the moon - and the first and only one for Haise and Swigert.

Added Haise: "We never hit the point where there was nothing left to do. So, no, we never got to a point where we said, `Well, we're going to die."'

The White House, less confident, demanded odds. Kranz refused, leaving it to others to put the crew's chances at 50-50. In his mind, there was no doubt, no room for failure -- only success.

"Basically that was the name of the game: I'm going to get them home. My team's going to get them home. We will get them home," Kranz recalled.

For the record, Kranz never uttered "failure is not an option." The line is pure Hollywood, created for the 1995 movie "Apollo 13" starring Ed Harris as Kranz and Tom Hanks as Lovell.

The flight controllers went into crisis mode. They immediately ordered the command module Odyssey shut down to conserve what little power remained, and the astronauts to move into the lunar module Aquarius, now a lifeboat.

One of the low points, Lovell said, was realizing they'd be cramped together in the lander.

"It was designed for two people for two days. We were three people for four days."

The carbon dioxide overload, from breathing, threatened to kill them.

Engineers scrambled to figure out how to convert the square air-purifying canisters in the dead capsule into round ones that would fit in their temporary home.

Their outside-the-box, seat-of-the-pants solution, using spacecraft scraps, worked. But it was so damp and cold that the astronauts couldn't sleep. Condensation covered the walls and windows, and the temperature was close to freezing.

Dehydrated and feverish, Haise had the roughest time during the six-day ordeal. Despite the sky-high stress, Haise recalls no cross words among the three test pilots. Even Swigert fit in, despite joining the crew a scant three days before liftoff. He replaced command module pilot Ken Mattingly, who with his crewmates had been exposed to German measles, but unlike them didn't have immunity.

Rumours swirled that the astronauts had poison pills tucked away in case of a hopeless situation. Lovell dispelled that notion on page one of his 1994 autobiography, "Lost Moon," the basis for the "Apollo 13? film.

Splashdown day finally arrived April 17, 1970 -- with no guarantees.

The astronauts managed to power up their command module, avoiding short circuits but creating a rainfall inside as the spacecraft decelerated in the atmosphere.

The communication blackout lasted 1 1/2 minutes longer than normal. Controllers grew alarmed. Finally, three billowing parachutes appeared above the Pacific. It was only then, Lovell said, that "we knew that we had it made."

The astronauts had no idea how much their cosmic cliffhanger impacted the world until they reached Honolulu. President Richard Nixon was there to greet them.

"We never dreamed a billion people were following us on television and radio, and reading about us in banner headlines of every newspaper published," Lovell noted in a NASA history.

The tank explosion later was linked to damage caused by electrical overheating in ground tests.

Apollo 13 "showed teamwork, camaraderie and what NASA was really made of," said Columbia University's Mike Massimino, a former shuttle astronaut.

In the decades since, Lovell and his wife, Marilyn, of nearly 68 years have discussed the what-ifs and might-have-beens.

"The outcome of everything is, naturally, that he's alive," she said, "and that we've had all these years."

The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Department of Science Education. The AP is solely responsible for all content,